These are challenging time for nursery grower . The dubiety surrounding vim , and the constantly rising damage , are drive agriculturalist everywhere to explore new slipway to reduce their energy consumption . agree to Ziv Shaked of Drygair , many cultivator already know that the most “ depressed - hanging fruit ” , regarding energy reduction , is dehumidification . " enclose a dehumidifier is one of the quickest and cheapest ways to reduce greenhouse muscularity economic consumption right away , but choose the right nursery dehumidifier is no soft task . Dehumidifiers vary in their engineering , operational requirements , capacity , extraction rates , and efficiency . "
According to Ziv , every dehumidifier producer uses dissimilar metrics when presenting their products . " This can create a wad of confusion , making the pick much more unmanageable than it should be . "
To make thing clearer , the company has put together the top component growers should believe when choosing the proper dehumidification system for their nursery :
Dehumidification TechnologyThe first matter that ’s important to take down when selecting a dehumidifier , is the type of engineering science . " There are two principal technologies when it get to nursery dehumidification – abridgment - based dehumidifiers , and desiccant - based dehumidifiers , " Ziv says .
Condensation - establish dehumidifiers , such as DryGair ’s , are the most unwashed solution to nursery humidity control . " They do n’t expect any other cloth to maneuver , " Ziv channelize out . " So , in essence , condensation - base dehumidifiers only need an zip input to contain humidity . "
Desiccant - based dehumidifiers work other than . Rather than using cooling to contract and pull water , they use a desiccant textile to soak up wet . " However , once the desiccant fabric runs out , it must be replaced to maintain efficacy , " Ziv enunciate . " Of course , desiccant - based dehumidifiers also postulate an energy input . "
Energy EfficiencyThe two types of dehumidifiers operate differently , yet Ziv observe that engineering is n’t the most crucial factor , but rather how expeditiously it ’s used . " Energy efficiency is by far the most important metric unit you should use when compare dehumidifiers . peculiarly during time like these , when vim prices are rising . "
To figure the zip efficiency of a dehumidifier , simply split the amount of water it extract , by the amount of energy it uses . For example , DryGair ’s DG-12 unit pull up 45 liters per time of day , using 10 kW of electricity . That makes the efficiency – 4.5 l per kWh .
To get the most accurate measurement , growers should always consider all vim generator . " So for example , if you use gasoline rather than electrical energy , or if your dehumidifier is connected to a warming system , you should include these sources in your efficiency reckoning . "
Design ConditionsZiv points out again how critical is to determine the DOE efficiency of a dehumidifier . " But to compare different solutions , there require to be similar conditions , " he tally . " Some dehumidifiers market to nursery raiser are n’t in reality designed for horticultural role , but rather for other industrial motivation . So , despite presenting high descent rates , they do n’t actually run in the same efficiency in literal - man greenhouse conditions . "
have ’s apply an example . A dehumidifier presents extraction rates of 45 liters per hour , at 26 ° C , and 100 % relative humidness . That may sound like a lot of piddle . But these are far from the conditions found in a successful commercial greenhouse .
Most greenhouses maintain much cooler temperature , around 18 ° C , and strive to keep humidity low , around 75 - 80 % . Under these term , the dehumidifier in our model wo n’t be able to slay nearly as much as 45 liters per hr .
On the other hand , a dehumidifier that boasts the same extraction pace , but at design conditions of 18 ° century and 80 % , will be able to successfully draw out the present amount of water in a real greenhouse .
" moreover , if it ’s warmer , or more humid , extraction rates will only go up , as there is more wet in the air . So , dehumidifiers designed for abject temperatures and lower humidness are much more efficient , " Ziv adds .
CondensationAnother aspect to consider is condensation . " When water start to appear , molds and mildew like botrytis start to develop . So it ’s very important to avoid dew period condensation all the metre . "
contraction usually happens when temperature drop . So the last thing you desire is a dehumidifier that ca n’t cope with lower temperatures . Ziv : " Using a dehumidifier that retains efficiency in cool temperatures is critical in avoid the dew percentage point and preventing disease . "
Airflow capacityAirflow capacity refers to the amount of air a dehumidifier can do by in a sure prison term point . Some manufacturers present this in m3 / 60 minutes , while others employ CFM ( three-dimensional feet per min ) . disregarding of the metric used , Ziv says it ’s crucial to sympathise what mental ability think of .
" For example , a greenhouse is 20 meters farsighted , 10 meter wide , and 4 meters high , meaning 800 m3 total . If a dehumidifier ’s airflow mental ability is 4,000 m3 / hour , it would be able-bodied to handle the intact loudness of air 5 times per 60 minutes , meaning 12 minute of arc to treat the entire nursery . If your greenhouse is too big for your dehumidifier ’s capacity , you may terminate up with gamey humidity and mold eruption . "
The high electrical capacity also means faster dehumidification . " So if humidity short spike , a dehumidifier with a higher capacity will be able to oppose quicker , and block it from go up further . "
Some growers use multiple dehumidifiers to reach the same capacitance as one more sinewy dehumidifier . But consort to Ziv , it ’s key to view that every dehumidifier requires its own place , energy , and sustainment . " So one larger dehumidifier is almost always better than several smaller ones . "
Air circulation vs directional airflowOne of the reasons growers use multiple dehumidifiers , rather than one , is to “ hatch more place ” . " But this has less to do with capacity , and more to do with the way some dehumidifiers scatter the treat tune , " Ziv state . " Most dehumidifiers release the dry air in one direction . This creates a “ humidness gradient ” , in which the air closest to the dehumidifier is very dry , but the melody further off is more humid . It also means the dehumidifier go along treat the same air over and over again , never reaching the far corners of the greenhouse . This is n’t just very inefficient , but it may also fail to prevent disease . "
Some dehumidifier manufacturers take this into consideration . DryGair , for representative , incorporates a patented atmosphere circulation mechanism , which pushes air travel in all steering , 360 ° . " This creates consistent condition everywhere in the greenhouse , both near the dehumidifier , and far aside . "
Every greenhouse has unique dehumidification requirementsNot only do dehumidifiers disagree from one to another , but also dehumidification needs greatly vary from one greenhouse to another , and there are many factors that affect specific demand .
Some of the factor determining your dehumidification requirements let in the sizing of the glasshouse , the type of crop , the routine of plant life and placement density , the geography and climate , the light , the heating and chill system and the thermal , shade or memory loss screens . " These are just some of the factors that affect humidness , but there are more . In short – determining your greenhouse ’s dehumidification need is complex , " Ziv summarizes .
" An often - overlooked factor , when compare dehumidifiers , is the manufacturer horticultural knowledge and expertness . Buying a dehumidifier without decent influence your needs , may cost you a lot , without even solving your humidness problem . It ’s always in effect to go with a dehumidifier manufacturing business that can help oneself you understand your pauperization , tailor a solution that can reliably solve your humidness problem , and provide the cognition needed to operate as in effect and efficiently as potential . "
For more data : DryGairwww.drygair.com[email protected ]
